package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.mapper.EmployeeMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetMealService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.List;

/**
 * @author DL5O
 * @version 1.0
 */
@Service
@Slf4j
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {
    @Autowired
    private DishService dishService;
    @Autowired
    private SetMealService setMealService;
    @Autowired
    private CategoryMapper categoryMapper;

    /**
     * 根据id删除分类，删除之前需要进行判断
     *
     * @param id
     */
    @Override
    public void remove(Long id) {
        //查询当前分类是否关联了菜品，如果已经关联，抛出一个业务异常
        LambdaQueryWrapper<Dish> dqw = new LambdaQueryWrapper<>();
        dqw.eq(Dish::getCategoryId, id);
        int count1 = dishService.count(dqw);
        if (count1 > 0) {
            //已经关联菜品，抛出一个业务异常
            log.info("当前分类关联了菜品，不能删除");
            //往外抛一个业务异常
            throw new CustomException("当前分类下关联了菜品，不能删除");
        }

        //查询当前分类是否关联了套餐，如果已经关联，抛出一个业务异常
        LambdaQueryWrapper<Setmeal> sqw = new LambdaQueryWrapper<>();
        sqw.eq(Setmeal::getCategoryId, id);
        int count2 = setMealService.count(sqw);
        if (count2 > 0) {
            //已经关联套餐，抛出一个业务异常
            throw new CustomException("当前分类下关联了套餐，不能删除");
        }
        //正常三处这个分类
        super.removeById(id);
    }

    /**
     *  获取有分类信息
     * @param type 是套餐还是分类 1为菜品分类，2位套餐分类
     * @return
     */
    @Override
    public List<Category> getList(Integer type) {
        LambdaQueryWrapper<Category> qw = new LambdaQueryWrapper<>();
        qw.eq(type != null,Category::getType,type);
        //根据排名进行排序，如果相同的情况下根据更新时间来排序
        qw.orderByAsc(Category::getSort).orderByAsc(Category::getUpdateTime);
        List<Category> categories = categoryMapper.selectList(qw);
        return categories;
    }



}
